Motor vehicle breather pipe attachment



June 21, 1932- DUNN 1,864,417

MOTOR VEHICLE BREATHER PIPE'ATTACHMENT Filed June 10, 1930 Patented June 21, 1932 UNITED STATES WEN DELL DUNN, 0F MARSHALLTOWN, IOWA MOTOR vnnrcnn BREATHER rrzen ATTACHMENT Application filed June 10, 1930. Serial No. 460,263

This invention relates to an attachment for internal combustion engines and particularly to an attachment for the breather tube or pipe of such an engine.

In a certain type of motor vehicle when the machine is running at high speed oil is thrown up through the breather pipe and escapes therefrom so that the side of the engine soon becomes covered.

It is a primary object of the present invention to provide a device covering the breather pipe of an engine of this character in such a manner that the oil fumes escaping therefrom will be carried off and prevented from entering the interior of the motor vehicle and in addition the oil which ordinarily splashes up and escapes from the breather pipe will be prevented from escaping and getting onto the body of the engine.

Another object of the invention is to provide an improved means for removing the oil fumes from the vicinity of the breather pipe mouth.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawing but may be changed or modified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

In the drawing:

Figure 1 is a view in longitudinal section of a breather pipe and the device embodying the present invention.

Figure 2 is a sectional View taken on the line 22 of Figure 1.

Referring more particularly to the drawing wherein like numerals of reference indicate corresponding parts throughout the several views, the numeral 1 indicates generally the breather pipe of a motor vehicleof the type in connection with which the pres,- ent device is designed to be used. The-device embodying the present invention comprises a cylindrical casing 2 of materially greater diameter, than the breather pipe 1, the lower end of which is reduced and provided with a collar 3 through which the breather pipe 1 extends, the upperend of the breather pipe being disposed in relatively close proximity to the top of the casing 2. About the top edge of the casing 2 and extending inwardly and downwardly therefrom is a shield or apron 4 the interior diameter of .which is substantially the same as or maybe a'little smaller than the breather pipe 1 so that oil discharged into the top of the casing will be directed downwardly into the breather pipe and will not escape around the outside. thereof. The upper end of the casing 2 is closed by a cover or lid 5 which is hingedly attached to the edge of the casing asindicated at 6. o

Adjacent the upper end the casing has an opening 7 formed through the wall thereof and'thereis attached to the wall to open through this opening an outwardly directed funnel shaped body 8, which, when the .device is in position upon the breather pipe 1, is directed toward the front of the machine so'that air driven backwardly by the engine fan, will be caught and passed into the cas-. ing At the opposite side of the casing 2 and in a lower plane than the opening 7 there is connected to the casing Wall a flexible tube or pipe 9 which opens through thewalland which leads to a point beneath the body of the motor vehicle so that the fumes escaping from the, pipe 1 into the casing will be carried off and not permitted to find their way upwardly into the interior of the vehicle.

Suspended in the breather pipe 'is an Yin-o verted substantially hemi-spherical cup. 10 the-edge of which is deeply serrated to form the downwardly directed teeth or, points 11.

Certain of these teeth are turned upwardly and are elongated in the manner shown and as indicated at 12 to extend to the top edge of the breather pipe so that they may be turned over the same to form supporting hooks for the cup, as indicated at 13. It will, of course, be understood that the diameter of the cup 10 is materially less than the interior diameter of the pipe 1 so that no serious impediment will be offered to the inflow of oil when the same is discharged into the top of the casing 2.

From the foregoing description it will be readily apparent that with a device of the character herein described attached A to an engine breather pipe the oil thrown up during the operation of the engine will be stopped by the cup 10 and will drip back into the engine.

At the same time the fumes which are generated and which escape from the breather pipe will be caught in the circulation of air passing through the pipe from the funnel shaped receptacle to the pipe 9 and carried ofi through this pipe for discharge at a point below the vehicle body.

Having thus described my invention, what I claim is:

1. A combined oil inlet and ventilation air inlet device for an engine crankcase; comprising an inner oil pipe open at its upper end, an outer casing enclosing the upper part of said pipe and having an inwardly extending flange about its top edge above the pipe and forming a central opening concentric with and smaller than the pipe, a cover for the casing, an air inlet through the wall of the casing adjacent the top thereof, and an air outlet and fume lead-off opening into the casing adjacent the bottom and at the opposite side from the air inlet. I

2. A combined oil inlet and ventilation air inlet device for an engine crankcase; comprising an inner oil pipe open at its upper end, an outer casing enclosing the upper part of said pipe and having an inwardly extendingfiange about its top edge above the pipe and forming a central opening concentric with and smaller than the pipe, a cover for the casing, an air inlet through the wall of the casing adjacent the top thereof, an air outlet and fume lead-01f opening into the casing adjacent the bottom and at the opposite side from the air inlet, and a guard member disposed in said pipe and preventing oil splashes passing through the pipe into the casing.

3. A combined oil inlet and ventilation air inlet device for an engine crankcase; comprising an inner oil pipe open at its upper end, an outer casing enclosing the upper part of said pipe and having an inwardly extending flange about its top edge above the pipe and forming a central opening concentric with and smaller than the pipe, a cover for signature.

WENDELL DUNN 

